duplicate fix from #37858

app/javascript/mastodon/features/emoji/loader.ts

@@ -21,10 +21,19 @@ export async function importEmojiData(localeString: string, path?: string) {
     path ??= await localeToPath(locale);
   }
 
+  // Fix from #37858. Check if we've loaded this path before.
+  const existing = await loadLatestEtag(locale);
+  if (existing === path) {
+    return null;
+  }
+
   const emojis = await fetchAndCheckEtag<CompactEmoji[]>(locale, path);
   if (!emojis) {
     return;
   }
+
+  await putLatestEtag(path, locale); // Fix from #37858. Put the path as the ETag to ensure we don't load the same data again.
+
   const flattenedEmojis: FlatCompactEmoji[] = flattenEmojiData(emojis);
   await putEmojiData(flattenedEmojis, locale);
   return flattenedEmojis;